Determine whether the expression is a partial sum of a arithmetic or geometric sequence. Then find the sum.
2.1 + 2.7 + 3.3 + ... + 13.5
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Mathematics
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Find the slope of the polar curve at the indicated point.r = 1 - sin ?, ? = 0
A. 
B. -1
C. 
D. 2
Mathematics
Provide an appropriate response.Starting with a tone having a frequency of 687 cycles per second, find the frequency of the tone that is two octaves higher.
A. 471,969 cps B. 1374 cps C. 2748 cps D. 5496 cps
Mathematics
Use special right triangles to evaluate the expression.tan 
A. 2
B. 
C. 
D. 
Mathematics
Solve the equation using the quadratic formula. Simplify irrational solutions, if possible.x2 + 8x - 5 = 0
A. {-4 ± 2
}
B. {4 ± 
}
C. {-1 ± 
}
D. {-4 ± 
}
Mathematics